`1` .She has started her job for a year 

`->` for `+` khoảng thời gian `->` HTHT 

`2` .They haven't visited the museum before

`3` .She has begun studying english since she was five 

`4` .sửa đề : the last time she met her parents was a year ago 

`->` viết lại : she has not met her parents for a year 

`5` .How long has it been since you last called her?

`6` .Is this the first time you've climbed mountain ?

`7` .I have read the book since last night 

`8` .He has not eaten a frog hotpot before 

`9` .He has started working as a teacher for 30 years

`10` .Haven't you visited Vietnam before 

`11` .When did you buy that bag 

`12` .Is this the first time you've tried sushi ?

`13` .How long have you begun listening to pop music ?

`14` .Has it been one month since we started learning English?

`15` .she has received her result of passing the entrance exam since June

`16` .I haven't seen him for 8 days

`17` .She hasn't seen her elder sister since 1999 

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`=>` cấu trúc hiện tại hoàn thành 

`(+)` S `+` have/has `+` V3/-ed

`(-)` S `+` have/has `+` not `+` V3/-ed

`(?)` Have/has `+` S `+` V3/-ed 

`DHNB`:

`-` just , recently , lately 

`-` already

`-` before

`-` ever 

`-` never

`-` for `+` khoảng thời gian

`-` since `+` mốc thời gian 

`->` this is the first time `+` S `+` have/has `+` V3/-ed 

`->` S `+` have/has `+` never `+` P2 + before

Các công thức đổi HTHT - QKĐ

Structure 1: 

S + has/have + not + V3/ed + for/since + time 

--> S + last + V2/ed 

--> The last time + S+ V2/ed + was + time 

--> It is / has been + time + since + S+ (last) + V2/ed 

Structure 2: 

How long + has/have + S+ V3/ed?

--> When + did + S + V1?

--> How long is it + since + S+ V2/ed ?

Structure 3:

S + has/have + V3/ed + for/since + time 

--> S + started / began + to V / Ving 

--> It is / has been + time + since + S+ V2/ed 

Structure 4: 

S + has/have + not/never + V3/ed + ... before

--> This/It is the first time + S+ has/have+ V3/ed

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1. She has started her new job for a year.

2. Đúng

3. She has studied ballet since she was five.

4. She has not met her parents for a year.

5. How long have you phoned her?

6. Is this the first time you have climbed a mountain?

7. I have read the book since last night.

8. She has not eaten a frog hotpot before.

9. He has worked as a teacher for 30 years.

10. Haven't you visited Vietnam before?

11. When did you buy that bag?

12. Is this the first time you have tried Sushi?

13. How long have you listened to pop music?

14. Have you learnt English for 1 month?

15. She has received her result of passing the entrance exam to high ... since June.

16. I haven't seen him for 8 days.

17. She hasn't seen her elder sister since 1999.

`color{orange}{~MiaMB~}`